I was having the same issue, then updated my .htaccess file to this:
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
# END WordPress
AddType x-mapp-php5 .php
AddHandler x-mapp-php5 .php
And it seems to be working now.
Good Luck